Tail: Manticore has a tail which, be uses to strike or grasp objects, as well as fire a powerful laser.

Origins:

The man who would become the Manticore lost (or was born without) his legs, although the details are unrevealed. At some point he was commissioned by the Brand Corporation, a division of Roxxon, to become an agent for them, in return for their construction of prosthetic or cybernetic legs for him.
He agreed and they fitted him with the powerful exo-skeleton, dubbing him Manticore.